Dr Jonathan Katz
MBBChir MD FRCP
Diabetes & Endocrinology Specialist
34 years of experience
Bushey, WD23 1RD
(+3 more)
45 connections in healthcare
Skill endorsed
by Dr Kwok Tang, Dr James Rakshi and 2 other professionals
34 years of experience
Bushey, WD23 1RD
(+3 more)
45 connections in healthcare
Skill endorsed
by Dr Kwok Tang, Dr James Rakshi and 2 other professionals
Areas of expertise
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About Dr Jonathan Katz
Dr Jonathan Katz is a Consultant in Diabetes & Endocrinology, based at Barnet Hospital, which is part of the The Royal Free London NHS Trust. He has over 30 years experience in treating patients with Thyroid problems, Pituitary disorders, Diabetes and other hormone imbalances including Calcium disorders, Menopause, Testosterone Deficiency and Addison's Disease.
Dr Katz studied medicine at Cambridge University and University College London, qualifying in 1991. He specialised in Endocrinology, completing registrar training at UCLH, the Whittington Hospital and the Royal Free Hospital. During higher training he undertook a two year research fellowship for his MD thesis on polycystic ovary syndrome. Following that, he worked for 1 year as a registrar in Sydney, Australia before returning to teh Royal Free Hospital for his final resgistrar year. Dr Katz was appointed as a Consultant in Diabetes and Endocrinology in 2002.
Dr Katz works as a Consultant Endocrinologist for the Royal Free London NHS Foundation Trust, based at Barnet Hospital. In 2009, he was elected as a Fellow of the Royal College of Physicians (FRCP), an honour granted to consultants providing the highest standards of care. In 2019, Dr Katz was appointed as Regional Advisor for the Royal College of Physicians – this is an elected post with wider responsibilities : supporting training, ensuring new consultant posts fulfil Royal College standards, chairing regional conference updates for physicians and appointing College Tutors.
Dr Katz has a busy NHS Endocrinology practice, seeing over 300 new patients and over 1000 follow-up patients each year. In addition, he looks after inpatients at Barnet Hospital with diabetes emergencies and acute endocrine disorders.
Areas of expertise
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Registered with
General Medical Council
No. 3490022
Education
University of Cambridge
Medicine
Graduated 1991
Qualifications
- MB BChir - Cambridge University 1991
- MD - University of London 2001
- FRCP - Royal College of Physicians 2009
Languages spoken
- English
Consultation fees
- New appointment: £295
- Follow-up appointment: £195
Insurers
- General and Medical
- Freedom Health Insurance
- The Exeter
- Simply Health (Dental)
- Healix Health Services
- Cigna
- Bupa
- WPA
- Allianz Worldwide Care
- AXA Health
- Aviva Health
- Vitality
- The PHC
- Benenden Health
Location
All locations for Dr Jonathan Katz
(710)
Chase Farm, Enfield, United Kingdom, EN28SD
(419)
Cavell Drive, Uplands Park Rd, Enfield, London, United Kingdom, EN2 7PR
(323)
290 Centennial Ave, Elstree Borehamwood, London, United Kingdom, WD6 3SU
Reviews
AI Review Summary
This summary was created by AI based on recent reviews
Dr Jonathan Katz is professional and excellent in patient interactions. He listens and gives clear explanations for conditions such as diabetes and thyroid disorders. Dr Katz takes a thorough approach, providing effective advice, diligent follow up care, and quick email responses. Thyroid issues and diabetes are major themes in his practice.
A very professional and warm welcome into his consultation room.Took time to listen to my concerns about my medications and any concerns I had about complcations or the progress of my diabetes Fully explained carefully monitoring my blood sugars to evaluate whether I was on the optimal medication and correct doses and whether there was at present any need for any further investigations. I was indeed very satisfied with my visit and appropriate follow up with blood results was arranged. I will have no hesitation in recommending him for his diabetes care of patients.
Good experience and was given all the information I needed by Dr.Katz to understand my medical issue and treatment
I have always found Dr Katz provides good care and advice. I see him for treatment of my overactive thyroid (Graves Disease) and he also looks after my father who has type 2 Diabetes . We have always been happy with the care we have received.
Dr Katz was very professional and personable. I came to him for a series of tests and he put my concerns at rest. I will for sure come back to him if ever I need to in the future. Thank you, Mrs J
I had a very positive experience with Dr. Katz. He explained everything clearly and took the time to ensure I understood my condition and the treatment options. He was extremely patient and made me feel comfortable asking questions. I also really appreciated how promptly he responded to emails which made communication easy and reassuring. Overall, a very professional, knowledgeable and caring doctor. I would highly recommend him.
Dr Katz is an excellent Doctor - he is extremely responsive, helpful, thorough and professional and I would trust his judgement 100%
Dr Katz was flawlessly efficient, absolutely understood my circumstances and goals in my treatment and was empathetic throughout.
I have found Dr Katz to be excellent with his care.He has been very clear in the way that he has explained my blood and sugar test results and I have found his advice to have helped me greatly. He is very knowledgeable,kind and attentive.
Skill Endorsements
Dr Katz consistently provides a top tier opinion on all aspects of endocrinology and diabetes. He has excellent clinical skills and patients I have referred him always receive great care. I have no hesitation in recommending him.
09 Apr 2026
Dr Kwok Tang
GastroenterologistJonathan is an excellent clinical colleague and diabetic specialist who I have known for over 20 years. He is a top opinion on a wide range of endocrine conditions and has a warm, thoughtful and caring approach to his patients.
30 Jan 2026
Dr James Rakshi
NeurologistDr Katz is an excellent Endocrinologist and highly regarded for his clinical skills, knowledge, and patient-centred approach. I have referred several patients and Dr. Katz has provided timely, evidence-based opinions.
05 Jan 2026
Dr Piyush Jain
CardiologistDr Katz is excellent. He is kind, experienced and pays close attention to detail. As a Paediatrician and Endocrinologist myself, I recommend him to all my patients and colleagues who need advice from a sensible and skilled adult endocrinologist.
20 Dec 2025
Dr Nirit Braha
Paediatrician
Get to know Dr Jonathan Katz
FAQ
What are Dr Jonathan Katz's reviews like?
Dr Jonathan Katz's overall patient rating is 5 out of 5 stars on Doctify. This is based on 31 reviews.
What languages does Dr Jonathan Katz speak?
Dr Jonathan Katz speaks English
Where is Dr Jonathan Katz located?
Dr Jonathan Katz primarily practices at Spire Bushey Hospital, located at Heathbourne Road, Bushey, United Kingdom, WD23 1RD
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What are Dr Jonathan Katz working hours?
Dr Jonathan Katz is working Wednesday (16:00 - 18:00), Thursday (15:00 - 17:00)
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Does Dr Jonathan Katz accept new patients?
Dr Jonathan Katz generally accepts new patients.
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